Some extracts from Zeki (1993) “A
Vision of the
Brain”(This is given as reference, but
substantive points made in
this book do not differ from those in the Scientific
American article: as the examples below show, the book is partly a
history of controversies over
cerebral localization of function, which are equally well covered in the Brain articles which are available online).

Mackay and Dunlop (1899) wrote that “the facts in this
remarkable case, the first, as far as
we know, in which a total acquired colour blindness from a
cerebral lesion has been
supported by pathological examination, point strongly towards the
conclusion that if there is a
separate centre for colour, its seat is the grey matter of the
fusiform gyrus.”

Later on Zeki discusses other cases and says:

“The first important point to note about
achromatopsia is that the retinal
mechanisms
mediating colour vision are intact in this condition... The
fibres carrying the messages from the
retina to the striate cortex are also intact. Hence the defect is
entirely central, due to a specific
lesion in the cerebral cortex. In brief, with achromatopsia,
we witness a condition in which
the signals relayed to the brain are normal but the mechanism used
to construct colours is
defective.” (pp 267-8)

Zeki, S. (1990) A century of cerebral achromatopsia.
Brain, 113, 1721-1777.
(available in the UCL Clinical Sciences Library, entrance on
University Street or via the BK elibrary | log on first for access outside the College.)

Chapter 10, p 82 A motion-blind
patient.

Zihl et al (1983) described a patient who had suffered
a vascular disorder, which
produced bilateral lesions outside the striate area. She had
several problems including
difficulties in calculations and mild aphasia. But her inability
to see objects in motion was very
striking. She had difficulty in pouring tea or coffee because the
fluid appeared to be frozen, like
a glacier. She complained of difficulties in following speech
because she could not see the
movements of the mouth of the speaker, and, when crossing the
road, was only aware of cars in
isolated individual positions, either near or far away.